Someone set a day. Someone choose the theme. Everyone finds a pic that relates to the theme, or subject. Display it for that day.
With so many themes and subjects to pick, this could be a regular thing every once and a while. You could even do an Avitar Scavenger Hunt. Someone gives the clues...then on the set day, show up with an avitar that you thought it was. (All in good taste of course)
Just give me nods from 5 people, and I'll choose someone to set the 1st date and theme in motion.
(if anyone wants to add to the protocol, that's fine, jump in)
Just a creative thought.